Endings are not pleasant, especially for the person who didn’t want the breakup. From my personal experience I lean towards a relapse. Doesn’t matter that she’s still going to AA and working with sponsor, she could still be drinking.
This stuff of yours, is it valuable stuff or just stuff? Sometimes we have to just let it all go, move away and move on. Again, my experience has been that the “stuff” is the glue still holding you onto her and the relationship.
I think once you are farther away from this relationship you’ll be able to look back and see what your part was in it. Maybe it was giving too much, maybe it was allowing it to be all about her and her issues and along the way you got lost in it all.